Has anyone come across an intro on planned contrasts.
I suppose a background in algebra is required to teach vector-space
contrasts. I've also seen multiple regression taught in terms of
vector-space and matrix algebra. Are contrasts considered important
to teach for experimental design,
any recommended texts? eg., the argument could be made that omnibus
tests are sufficient.
Usually I don't see the term "planned contrast" in non-statistical
literature, maybe I just haven't been aware of it.
-wuzzy
.
.
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